September 2016
Beginner to intermediate
593 pages
12h 12m
English
book
Raspberry Pi: Amazing Projects from Scratch
by Ashwin Pajankar, Arush Kakkar, Matthew Poole, Richard Grimmett
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
12V alarm zone circuits
Making our zone circuits use 12V instead of 3.3V is as simple as changing the power supply, and in fact all of sensors we used so far can handle 12V power passed through their switches.
However, if we were to present the 12V circuit to the inputs on our GPIO port on the Raspberry Pi or our port expander, we would expect to see some magic smoke and smell something burning. So, we need to add some circuitry that allows us to use 12V alarm circuits as well as protect our control board inputs.
Alarm circuit protection
An effective way to protect our zone inputs from 12V alarm inputs is to use a little low-cost device called an opto-isolator. As the name suggests, this isolates the alarm circuit from the digital inputs of the control ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.